sw_engine: support color blending

this contains testBlending as well

Change-Id: Ia0aadea804a973cfe8ec981ed1b21c1b44512ef2

.gitignore

@@ -7,3 +7,4 @@ testMergeShapes
 testBoundary
 testPath
 testPathCopy
+testBlending

inc/tizenvg.h

@@ -179,9 +179,9 @@ class TIZENVG_EXPORT SwCanvas final : public Canvas
 public:
     ~SwCanvas();
 
-    int target(uint32_t* buffer, size_t stride, size_t height) noexcept;
+    int target(uint32_t* buffer, size_t stride, size_t w, size_t h) noexcept;
     int sync() noexcept override;
-    static std::unique_ptr<SwCanvas> gen(uint32_t* buffer = nullptr, size_t stride = 0, size_t height = 0) noexcept;
+    static std::unique_ptr<SwCanvas> gen() noexcept;
 
     _TIZENVG_DECLARE_PRIVATE(SwCanvas);
 };

src/lib/sw_engine/tvgSwCommon.h

@@ -99,6 +99,6 @@ bool shapeGenRle(const ShapeNode& shape, SwShape& sdata, const SwSize& clip);
 bool shapeTransformOutline(const ShapeNode& shape, SwShape& sdata);
 SwRleData* rleRender(const SwShape& sdata, const SwSize& clip);
 
-bool rasterShape(Surface& surface, SwShape& sdata, size_t color);
+bool rasterShape(Surface& surface, SwShape& sdata, uint8_t r, uint8_t g, uint8_t b, uint8_t a);
 
 #endif /* _TVG_SW_COMMON_H_ */

src/lib/sw_engine/tvgSwRaster.cpp

@@ -20,20 +20,66 @@
 #include "tvgSwCommon.h"
 
 
-bool rasterShape(Surface& surface, SwShape& sdata, size_t color)
+/************************************************************************/
+/* Internal Class Implementation                                        */
+/************************************************************************/
+
+static inline size_t COLOR_ALPHA_BLEND(size_t color, size_t alpha)
+{
+  return (((((color >> 8) & 0x00ff00ff) * alpha) & 0xff00ff00) +
+          ((((color & 0x00ff00ff) * alpha) >> 8) & 0x00ff00ff));
+}
+
+
+static inline size_t COLOR_ARGB_JOIN(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
+{
+    return (a << 24 | r << 16 | g << 8 | b);
+}
+
+
+static void
+_drawTranslucentSpan(uint32_t* dst, size_t len, size_t color, size_t alpha)
+{
+  //OPTIMIZE ME: SIMD
+  auto ialpha = 255 - alpha;
+  for (size_t i = 0; i < len; ++i) {
+    dst[i] = color + COLOR_ALPHA_BLEND(dst[i], ialpha);
+  }
+}
+
+
+static void
+_drawSolidSpan(uint32_t* dst, size_t len, size_t color)
+{
+  //OPTIMIZE ME: SIMD
+  for (size_t i = 0; i < len; ++i) {
+    dst[i] = color;
+  }
+}
+
+
+/************************************************************************/
+/* External Class Implementation                                        */
+/************************************************************************/
+
+bool rasterShape(Surface& surface, SwShape& sdata, uint8_t r, uint8_t g, uint8_t b, uint8_t a)
 {
     SwRleData* rle = sdata.rle;
     if (!rle) return false;
 
-    auto stride = surface.stride;
     auto span = rle->spans;
+    auto stride = surface.stride;
+    auto color = COLOR_ARGB_JOIN(r, g, b, a);
 
     for (size_t i = 0; i < rle->size; ++i) {
         assert(span);
-//        printf("raster y(%d) x(%d) len(%d)\n", span->y, span->x, span->len);
+
-        for (auto j = 0; j < span->len; ++j) {
+        auto dst = &surface.buffer[span->y * stride + span->x];
-            surface.buffer[span->y * stride + span->x + j] = color;
+        assert(dst);
-        }
+
+        if (a == 255) _drawSolidSpan(dst, span->len, color);
+        else _drawTranslucentSpan(dst, span->len, color, a);
+
         ++span;
     }
 

src/lib/sw_engine/tvgSwRenderer.cpp

@@ -26,22 +26,33 @@
 
 static RenderInitializer renderInit;
 
-static inline size_t COLOR(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
-{
-    return (a << 24 | r << 16 | g << 8 | b);
-}
-
 /************************************************************************/
 /* External Class Implementation                                        */
 /************************************************************************/
 
-bool SwRenderer::target(uint32_t* buffer, size_t stride, size_t height)
+bool SwRenderer::clear()
 {
-    assert(buffer && stride > 0 && height > 0);
+    if (!surface.buffer) return false;
+
+    assert(surface.stride > 0 && surface.w > 0 && surface.h > 0);
+
+    //OPTIMIZE ME: SIMD!
+    for (size_t i = 0; i < surface.h; i++) {
+        for (size_t j = 0; j < surface.w; j++)
+            surface.buffer[surface.stride * i + j] = 0xff000000;  //Solid Black
+    }
+
+    return true;
+}
+
+bool SwRenderer::target(uint32_t* buffer, size_t stride, size_t w, size_t h)
+{
+    assert(buffer && stride > 0 && w > 0 && h > 0);
 
     surface.buffer = buffer;
     surface.stride = stride;
-    surface.height = height;
+    surface.w = w;
+    surface.h = h;
 
     return true;
 }
@@ -57,7 +68,7 @@ bool SwRenderer::render(const ShapeNode& shape, void *data)
     shape.fill(&r, &g, &b, &a);
 
     //TODO: Threading
-    return rasterShape(surface, *sdata, COLOR(r, g, b, a));
+    return rasterShape(surface, *sdata, r, g, b, a);
 }
 
 
@@ -92,7 +103,7 @@ void* SwRenderer::prepare(const ShapeNode& shape, void* data, UpdateFlag flags)
         if (!shapeGenOutline(shape, *sdata)) return sdata;
         if (!shapeTransformOutline(shape, *sdata)) return sdata;
 
-        SwSize clip = {static_cast<SwCoord>(surface.stride), static_cast<SwCoord>(surface.height)};
+        SwSize clip = {static_cast<SwCoord>(surface.w), static_cast<SwCoord>(surface.h)};
         if (!shapeGenRle(shape, *sdata, clip)) return sdata;
     }
 

src/lib/sw_engine/tvgSwRenderer.h

@@ -25,7 +25,8 @@ public:
     void* prepare(const ShapeNode& shape, void* data, UpdateFlag flags) override;
     bool dispose(const ShapeNode& shape, void *data) override;
     bool render(const ShapeNode& shape, void *data) override;
-    bool target(uint32_t* buffer, size_t stride, size_t height);
+    bool target(uint32_t* buffer, size_t stride, size_t w, size_t h);
+    bool clear();
     size_t ref() override;
     size_t unref() override;
 

src/lib/tvgRenderCommon.h

@@ -25,7 +25,7 @@ struct Surface
     //TODO: Union for multiple types
     uint32_t* buffer;
     size_t stride;
-    size_t height;
+    size_t w, h;
 };
 
 class RenderMethod

src/lib/tvgSwCanvas.cpp

@@ -45,12 +45,13 @@ SwCanvas::~SwCanvas()
 }
 
 
-int SwCanvas::target(uint32_t* buffer, size_t stride, size_t height) noexcept
+int SwCanvas::target(uint32_t* buffer, size_t stride, size_t w, size_t h) noexcept
 {
     auto renderer = dynamic_cast<SwRenderer*>(engine());
     assert(renderer);
 
-    if (!renderer->target(buffer, stride, height)) return -1;
+    if (!renderer->target(buffer, stride, w, h)) return -1;
+    if (!renderer->clear()) return -1;
 
     return 0;
 }
@@ -62,14 +63,11 @@ int SwCanvas::sync() noexcept
 }
 
 
-unique_ptr<SwCanvas> SwCanvas::gen(uint32_t* buffer, size_t stride, size_t height) noexcept
+unique_ptr<SwCanvas> SwCanvas::gen() noexcept
 {
     auto canvas = unique_ptr<SwCanvas>(new SwCanvas);
     assert(canvas);
 
-    int ret = canvas.get()->target(buffer, stride, height);
-    if (ret > 0)  return nullptr;
-
    return canvas;
 }
 

test/makefile

@@ -5,3 +5,4 @@ all:
 	gcc -o testBoundary testBoundary.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testPath testPath.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testPathCopy testPathCopy.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
+	gcc -o testBlending testBlending.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`

test/testBlending.cpp

@@ -0,0 +1,97 @@
+#include <tizenvg.h>
+#include <Elementary.h>
+
+using namespace std;
+
+#define WIDTH 800
+#define HEIGHT 800
+
+static uint32_t buffer[WIDTH * HEIGHT];
+
+void tvgtest()
+{
+    //Initialize TizenVG Engine
+    tvg::Engine::init();
+
+    //Create a Canvas
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
+    canvas->reserve(5);
+
+    //Prepare Round Rectangle
+    auto shape1 = tvg::ShapeNode::gen();
+    shape1->appendRect(0, 0, 400, 400, 50);      //x, y, w, h, cornerRadius
+    shape1->fill(0, 255, 0, 255);                //r, g, b, a
+    canvas->push(move(shape1));
+
+    //Prepare Circle
+    auto shape2 = tvg::ShapeNode::gen();
+    shape2->appendCircle(400, 400, 200, 200);    //cx, cy, radiusW, radiusH
+    shape2->fill(170, 170, 0, 170);              //r, g, b, a
+    canvas->push(move(shape2));
+
+    //Prepare Ellipse
+    auto shape3 = tvg::ShapeNode::gen();
+    shape3->appendCircle(400, 400, 250, 100);    //cx, cy, radiusW, radiusH
+    shape3->fill(100, 100, 100, 100);            //r, g, b, a
+    canvas->push(move(shape3));
+
+    //Prepare Star
+    auto shape4 = tvg::ShapeNode::gen();
+    shape4->moveTo(199, 234);
+    shape4->lineTo(253, 343);
+    shape4->lineTo(374, 360);
+    shape4->lineTo(287, 444);
+    shape4->lineTo(307, 565);
+    shape4->lineTo(199, 509);
+    shape4->lineTo(97, 565);
+    shape4->lineTo(112, 445);
+    shape4->lineTo(26, 361);
+    shape4->lineTo(146, 343);
+    shape4->close();
+    shape4->fill(200, 0, 200, 200);
+    canvas->push(move(shape4));
+
+    //Prepare Opaque Ellipse
+    auto shape5 = tvg::ShapeNode::gen();
+    shape5->appendCircle(600, 650, 200, 150);
+    shape5->fill(0, 0, 255, 255);
+    canvas->push(move(shape5));
+
+    //Draw the Shapes onto the Canvas
+    canvas->draw();
+    canvas->sync();
+
+    //Terminate TizenVG Engine
+    tvg::Engine::term();
+}
+
+void
+win_del(void *data, Evas_Object *o, void *ev)
+{
+   elm_exit();
+}
+
+int main(int argc, char **argv)
+{
+    tvgtest();
+
+    //Show the result using EFL...
+    elm_init(argc, argv);
+
+    Eo* win = elm_win_util_standard_add(NULL, "TizenVG Test");
+    evas_object_smart_callback_add(win, "delete,request", win_del, 0);
+
+    Eo* img = evas_object_image_filled_add(evas_object_evas_get(win));
+    evas_object_image_size_set(img, WIDTH, HEIGHT);
+    evas_object_image_data_set(img, buffer);
+    evas_object_size_hint_weight_set(img, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
+    evas_object_show(img);
+
+    elm_win_resize_object_add(win, img);
+    evas_object_geometry_set(win, 0, 0, WIDTH, HEIGHT);
+    evas_object_show(win);
+
+    elm_run();
+    elm_shutdown();
+}

test/testBoundary.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
     canvas->reserve(5);             //reserve 5 shape nodes (optional)
 
     //Prepare Shape1

test/testMergeShapes.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
 
     //Prepare a Shape (Rectangle + Rectangle + Circle + Circle)
     auto shape1 = tvg::ShapeNode::gen();

test/testMultiShapes.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
     canvas->reserve(3);                          //reserve 3 shape nodes (optional)
 
     //Prepare Round Rectangle

test/testPath.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
 
     //Star
     auto shape1 = tvg::ShapeNode::gen();

test/testPathCopy.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
 
     /* Star */
 

test/testShape.cpp

@@ -14,7 +14,8 @@ void tvgtest()
     tvg::Engine::init();
 
     //Create a Canvas
-    auto canvas = tvg::SwCanvas::gen(buffer, WIDTH, HEIGHT);
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
 
     //Prepare a Shape (Rectangle)
     auto shape1 = tvg::ShapeNode::gen();